Abstract
Background
The prognosis in patients with intrahepatic cholangiocarcinoma (ICC) is generally poor. To improve treatment selection, we sought to identify microRNA (miRNA) signature associated with survival outcomes in ICC.
Methods
We first analysed the miRNA expression profiles of primary ICC from two public datasets to identify a miRNA panel to detect patients for short-term survival. We then analysed 309 specimens, including 241 FFPE samples from two clinical cohorts (training: n = 177; validation: n = 64) and matched plasma samples (n = 68), and developed a risk-stratification model incorporating the panel and CA 19-9 levels to predict survival outcomes in ICC.
Results
We identified a 7-miRNA panel that robustly classified patients with poor outcomes in the discovery cohorts (AUC = 0.80 and 0.88, respectively). We subsequently trained this miRNA panel in a clinical cohort (AUC = 0.83) and evaluated its performance in an independent validation cohort (AUC = 0.82) and plasma samples from the additional validation cohort (AUC = 0.78). Patients in both clinical cohorts who were classified as high-risk had significantly worse prognosis (p < 0.01). The risk-stratification model demonstrated superior performance compared to models (AUC = 0.85).
Conclusions
We established a novel miRNA signature that could robustly predict survival outcomes in resected tissues and liquid biopsies to improve the clinical management of patients with ICC.
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Data availability
TCGA miRNA expression profiling data were downloaded from the University of California, Santa Cruz Xena Browser (https://xenabrowser.net). Normalised non-coding RNA profiling and clinical data from the GSE53870 dataset were downloaded from the Gene Expression Omnibus database.
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Acknowledgements
We thank Drs. Tatsuhiko Kakisaka, Satoshi Nishiwada, Geeta Sharma, Divya Sahu, In-Seob Lee, and Yasuyuki Okada for discussing the experiments and analysis. We thank Drs. Kensuke Yamamura, Takeo Toshima, Masaaki Nishi, Shinichiro Yamada, and Kazunori Tokuda, as well as Ms. Yumi Horikawa, for collecting clinical samples and information. We also would like to extend our thanks to Dr. Kerin Higa for her significant editing and useful suggestions for improving the quality of our manuscript.
Funding
This work was supported by CA72851, CA181572, CA184792, CA202797, and CA227602 grants from the National Cancer Institute, National Institutes of Health.
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Y Wada: Study concept and design; specimen provider; acquisition of clinical data; analysis and interpretation of data and statistical analysis; drafting of the manuscript. M Shimada: Study concept and design; specimen provider; acquisition of clinical data; drafting of the manuscript. Y Morine: Study concept and design; specimen provider; acquisition of clinical data; drafting of the manuscript. T Ikemoto: Study concept and design; specimen provider; acquisition of clinical data; drafting of the manuscript. Y Saito: Study concept and design; specimen provider; acquisition of clinical data; drafting of the manuscript. H Baba: Study concept and design; specimen provider; acquisition of clinical data; drafting of the manuscript. M Mori: Study concept and design; specimen provider; acquisition of clinical data; drafting of the manuscript. A Goel: Study concept and design; analysis and interpretation of data and statistical analysis; drafting of the manuscript
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Wada, Y., Shimada, M., Morine, Y. et al. A blood-based noninvasive miRNA signature for predicting survival outcomes in patients with intrahepatic cholangiocarcinoma. Br J Cancer 126, 1196–1204 (2022). https://doi.org/10.1038/s41416-022-01710-z
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DOI: https://doi.org/10.1038/s41416-022-01710-z